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[1/2] on a trail to go Mount Tomamu (1,239 m elevation) on July 20 2012.

Hypericum erectum on volcanoes in Hokkaido

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[1/2] seedlings emerged from seeds in the former topsoil on Mount Usu. The topsoil was collected in September 2008. Plants grew on July 14 2009 in the greenhosue of Center of Advanced Science and Technology (CAST), HU. [3-6] on the summit area of Mount Koma on July 21 2011. Note: One species, H. erectum is reported in Flora of Mount Usu (Hara 1978). Lab-experiment on seedbank (埋土種子) in the former topsoil of Mount Usu: Seedling emergence began one week after seed-sowing, and ceased about 20 days later (Tsuyuzaki & Goto 2001). The species have only black gland → non-exotic.